The fighting broke out about two hours after sundown.

战斗在日落后大约两小时打响了。

《柯林斯英汉双解大词典》

The formerly small supper after sundown becomes the big meal of the day, the only one at which the family has a chance to get together.

原本日落后的小型晚餐成为一天中的大餐，这是一家人唯一有机会聚在一起的时候。

youdao

So the formerly small supper after sundown becomes the big meal of the day, the only one at which the family has a chance to get together.

因此，原本日落后的小晚餐成为一天中的大餐，这是一家人唯一有机会聚在一起的时候。

youdao

Because he stargazes for as long as eight hours at a time--from after sundown until sunup--he also has installed a space heater, a minifridge stocked with Diet Coke and a CD player that serenades him with Mozart string quartets.

FORBES: A Star Is Born

Each night after sundown, drills commenced.

NEWYORKER: Getting Bin Laden

But as a child, I loved it, not just for Carson, but also for the version of New York it signified: glamorous, witty, grown-up and, especially, nocturnal (even after I knew it was taped around sundown).

WSJ: Remembering a time before 'Tonight' left New York